Datasheet

 2002-2013 Microchip Technology Inc. DS21752B-page 3
MCP1252/3
1.0 ELECTRICAL
CHARACTERISTICS
Absolute Maximum Ratings †
Power Supply Voltage, V
IN
...............................................6.0V
Voltage on Any Pin w.r.t. GND ............... -0.3V to (V
IN
+ 0.3V)
Output Short Circuit Duration ................................continuous
Storage Temperature Range.........................-65°C to +150°C
Ambient Temperature with Power Applied....-55°C to +125°C
Junction Temperature .................................................+150°C
ESD Ratings:
Human Body Model (1.5 k in Series with 100 pF 4kV
Machine Body Model (200 pF, No Series Resistance400V
†Notice: Stresses above those listed under “Maximum Rat-
ings” may cause permanent damage to the device. This is a
stress rating only and functional operation of the device at
those or any other conditions above those indicated in the
operational listings of this specification is not implied. Expo-
sure to maximum rating conditions for extended periods may
affect device reliability.
PIN FUNCTION TABLE
ELECTRICAL CHARACTERISTICS
Name Function
PGOOD Open-Drain Power GOOD Output
V
OUT
Regulated Output Voltage
V
IN
Power Supply Input
GND Ground Terminal
C- Flying Capacitor Negative Terminal
C+ Flying Capacitor Positive Terminal
SHDN
Shutdown Mode, Active-Low Input
SELECT
Output Voltage Select Pin.
(MCP1252-33X50, MCP1253-33X50)
FB
Feedback Input Pin for Adjustable Output
(MCP1252-ADJ, MCP1253-ADJ)
Electrical Specifications: Unless otherwise specified, all limits are specified for T
A
= -40°C to +85°C, SHDN = V
IN
,
C
IN
= C
OUT
= 10 µF, C
FLY
= 1 µF, I
OUT
= 10 mA. Typical values are for T
A
= +25°C.
Parameters Sym Min Typ Max Units Conditions
Selectable Output - MCP1252-33X50, MCP1253-33X50: SELECT = V
IN
, V
OUT
= 3.3V
Supply Voltage V
IN
2.1 — 5.5 V
Output Voltage Accuracy V
OUT
-2.5 +/-0.5 +2.5 % 2.3V  V
IN
< 2.5V, I
OUT
80 mA
2.5V V
IN
5.5V, I
OUT
120 mA
Output Current I
OUT
80
120
100
150
—mA
mA
2.3V  V
IN
< 2.5V
2.5V  V
IN
 5.5V
SELECT Logic Input Voltage High V
IH
1.4 — — V MCP1252-33X50, MCP1253-33X50
Selectable Output - MCP1252-33X50, MCP1253-33X50: SELECT = GND, V
OUT
= 5.0V
Supply Voltage V
IN
2.7 — 5.5 V
Output Voltage Accuracy V
OUT
-2.5 +/-0.5 +2.5 % 2.7V V
IN
< 3.0V, I
OUT
40 mA
3.0V V
IN
5.5V, I
OUT
120 mA
Output Current I
OUT
40
120
80
150
—mA
mA
2.7V  V
IN
< 3.0V
3.0V  V
IN
 5.5V
SELECT Logic Input Voltage Low V
IL
— — 0.4 V MCP1252-33X50, MCP1253-33X50
Adjustable Output - MCP1252-ADJ, MCP1253-ADJ
Supply Voltage V
IN
2.0 — 5.5 V
Output Voltage Adjustment Range V
OUT
1.5 — 5.5 V V
OUT(MAX)
< 2 x V
IN
FB Regulation Voltage V
FB
1.18 1.21 1.24 V MCP1252-ADJ, MCP1253-ADJ
ALL DEVICES
Supply Current I
DD
— 60 120 µA No load
Output Short-Circuit Current I
SC
— 200 — mA V
OUT
= GND, foldback current
Shutdown Current I
SHDN
— 0.1 2.0 µA SHDN = 0V
Power Efficiency  —81
68
—%
%
V
IN
= 3.0V, V
OUT
= 5V
V
IN
= 3.6V, V
OUT
= 5V
I
OUT
=120 mA
SHDN
Logic Input Voltage Low V
IL
——0.4V
SHDN
Logic Input Voltage High V
IH
1.4 — — V
PGOOD Threshold Voltage V
TH
— 0.93V
OUT
—V
PGOOD Hysteresis V
HYS
— 0.04V
OUT
—V